Apply source build patches (#8338)

* Build Microsoft.DotNet.Build.Tasks.Workloads for net6.0

* workaround for hardcoded DotNetSharedFrameworkTaskDir

* don't use obsolete managed SHA256 class

Co-authored-by: Michael Simons <[email protected]>

Author: lbussell

src/Microsoft.DotNet.Build.Tasks.Workloads/src/Microsoft.DotNet.Build.Tasks.Workloads.csproj

@@ -2,6 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFrameworks>net472;netcoreapp3.1</TargetFrameworks>
+    <TargetFrameworks Condition="'$(DotNetBuildFromSource)' == 'true'">net6.0</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <LangVersion>Latest</LangVersion>
     <IsPackable>true</IsPackable>

src/Microsoft.DotNet.Build.Tasks.Workloads/src/Utils.cs

@@ -122,7 +122,7 @@ public static Guid CreateUuid(Guid namespaceUuid, string name)
             Buffer.BlockCopy(nameBytes, 0, hashBuffer, 16, nameBytes.Length);
             byte[] hash;
 
-            using (SHA256 sha256 = new SHA256Managed())
+            using (SHA256 sha256 = SHA256.Create())
             {
                 hash = sha256.ComputeHash(hashBuffer);
             }

src/Microsoft.DotNet.SharedFramework.Sdk/sdk/Sdk.props

@@ -10,6 +10,9 @@
   <PropertyGroup Condition="'$(DotNetSharedFrameworkTaskDir)' == ''">
     <DotNetSharedFrameworkTaskDir Condition="'$(MSBuildRuntimeType)' == 'core'">$(MSBuildThisFileDirectory)../tools/netcoreapp3.1/</DotNetSharedFrameworkTaskDir>
     <DotNetSharedFrameworkTaskDir Condition="'$(MSBuildRuntimeType)' != 'core'">$(MSBuildThisFileDirectory)../tools/net472/</DotNetSharedFrameworkTaskDir>
+
+    <!-- Workaround for https://github.com/dotnet/arcade/issues/7413 -->
+    <DotNetSharedFrameworkTaskDir Condition="'$(MSBuildRuntimeType)' == 'core' and '$(DotNetBuildFromSource)' == 'true'">$(MSBuildThisFileDirectory)../tools/net6.0/</DotNetSharedFrameworkTaskDir>
   </PropertyGroup>
 
   <PropertyGroup>